Sofa



FIG. 1 is a front perspective view of a sofa of my design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a back elevation view thereof;

FIG. 7 is a left side view thereof; and,

FIG. 8 is a right side view thereof.

The broken lines shown in the drawings are for illustrative purposesonly and form no part of the claimed design.

I claim the ornamental design for a sofa, as shown and described.